leetcodee 44题为什么要更新星号的位置呢

先上题干， 不明白更新starIndex的意义在于？

Given an input string (s) and a pattern (p), implement wildcard pattern matching with support for '?' and '*' where:
'?' Matches any single character.
'*' Matches any sequence of characters (including the empty sequence).
The matching should cover the entire input string (not partial).

1. bool isMatch(const char *s, const char *p) {
   
2.         const char* star=NULL;
   
3.         const char* ss=s;
   
4.         while (*s){
   
5.             //advancing both pointers when (both characters match) or ('?' found in pattern)
   
6.             //note that *p will not advance beyond its length
   
7.             if ((*p=='?')||(*p==*s)){s++;p++;continue;}
   
8. 
   
9.             // * found in pattern, track index of *, only advancing pattern pointer
   
10.             if (*p=='*'){star=p++; ss=s;continue;}
    
11. 
    
12.             //current characters didn't match, last pattern pointer was *, current pattern pointer is not *
    
13.             //only advancing pattern pointer
    
14.             if (star){ p = star+1; s=++ss;continue;}
    
15. 
    
16.            //current pattern pointer is not star, last patter pointer was not *
    
17.            //characters do not match
    
18.             return false;
    
19.         }
    
20. 
    
21.        //check for remaining characters in pattern
    
22.         while (*p=='*'){p++;}
    
23. 
    
24.         return !*p;  
    
25.     }

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